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Informal Pizza SeminarTowards a Non-Singular Theory of GravityDamien EassonMcGillIn this talk I will discuss some nonsingular black hole and cosmological solutions. I will begin with an introduction to the Limiting Curvature Hypothesis (LCH) and describe how it may be used to construct a nonsingular Schwarzschild black hole with de Sitter interior in (1+1)-dimensions. We then consider the possibility that by including leading order stringy (alpha') corrections in the low-energy effective action for heterotic string theory, it may be possible to avoid the initial cosmological singularity. A solution that evolves from an early time de Sitter phase to a late time Minkowski universe with constant dilaton will be given.
Tuesday, April 29th 2003, 13:00
Ernest Rutherford Physics Building, room 326 |